Related Experiment Video
Updated: Sep 20, 2025
12:37
Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
Published on: September 7, 2013
18.4K
Serotonin (5-HT) 2A Receptor Involvement in Melanin Synthesis and Transfer via Activating the PKA/CREB Signaling
Yunyun Yue1, Min Zhong1, Xiaohong An1
1School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
International Journal of Molecular Sciences
|June 10, 2022
Summary
The 5-HT2A serotonin receptor (HTR2A) regulates melanogenesis, the process of melanin production. Targeting HTR2A shows potential for treating skin pigmentation disorders by modulating melanin synthesis and melanosome transfer.
Area of Science:
- Dermatology
- Molecular Biology
- Pharmacology
Background:
- The 5-HT2A serotonin receptor (HTR2A) is implicated in melanogenesis, but its precise molecular mechanisms are unclear.
- Understanding HTR2A's role is crucial for developing treatments for pigment-associated skin conditions.
Purpose of the Study:
- To elucidate the downstream signaling pathways of HTR2A in melanogenesis regulation.
- To evaluate the therapeutic potential of targeting HTR2A for pigmentary disorders.
Main Methods:
- Utilized mouse melanoma cells (B16F10), human skin tissue, and zebrafish embryos.
- Employed HTR2A antagonists (AT1015, ketanserin) and agonists (DOI, TCB-2).
- Investigated protein expression, melanosome organization, melanocyte dendrites, and PKA/CREB signaling pathway activation.
- Performed genetic knockout of zebrafish htr2aa.
Main Results:
- HTR2A antagonists reduced serotonin-induced melanogenesis in mouse cells and zebrafish.
- HTR2A agonists enhanced melanin synthesis and transfer in B16F10 cells, human skin, and zebrafish embryos.
- HTR2A activation promoted melanosome organization, melanocyte dendrites, migration, and transport via the PKA/CREB pathway.
Conclusions:
- HTR2A plays a critical role in mediating melanogenesis and melanocyte function.
- HTR2A is a promising drug target for treating cutaneous diseases involving melanocyte or melanogenesis abnormalities.
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